Function FiosGetFileList

src/fios.cpp:307–361

* Fill the list of the files in a directory, according to some arbitrary rule. * @param fop Purpose of collecting the list. * @param show_dirs Whether to list directories. * @param callback_proc The function that is called where you need to do the filtering. * @param subdir The directory from where to start (global) searching. * @param file_list Destination of the found files. */

 * @param file_list Destination of the found files.
 */
static void FiosGetFileList(SaveLoadOperation fop, bool show_dirs, FiosGetTypeAndNameProc *callback_proc, Subdirectory subdir, FileList &file_list)
{
	size_t sort_start = 0;

	file_list.clear();

	assert(_fios_path != nullptr);

	if (show_dirs) {
		/* A parent directory link exists if we are not in the root directory */
		if (!FiosIsRoot(*_fios_path)) {
			FiosItem &fios = file_list.emplace_back();
			fios.type = FIOS_TYPE_PARENT;
			fios.mtime = 0;
			fios.name = "..";
			fios.title = GetEncodedString(STR_SAVELOAD_PARENT_DIRECTORY, ".."sv);
			sort_start = file_list.size();
		}

		/* Show subdirectories */
		std::error_code error_code;
		for (const auto &dir_entry : std::filesystem::directory_iterator(OTTD2FS(*_fios_path), error_code)) {
			if (!dir_entry.is_directory()) continue;
			if (FiosIsHiddenFile(dir_entry) && dir_entry.path().filename() != PERSONAL_DIR) continue;

			FiosItem &fios = file_list.emplace_back();
			fios.type = FIOS_TYPE_DIR;
			fios.mtime = 0;
			fios.name = FS2OTTD(dir_entry.path().filename().native());
			fios.title = GetEncodedString(STR_SAVELOAD_DIRECTORY, fios.name + PATHSEP);
		}

		/* Sort the subdirs always by name, ascending, remember user-sorting order */
		SortingBits order = _savegame_sort_order;
		_savegame_sort_order = SORT_BY_NAME | SORT_ASCENDING;
		std::sort(file_list.begin() + sort_start, file_list.end());
		_savegame_sort_order = order;
	}

	/* This is where to start sorting for the filenames */
	sort_start = file_list.size();

	/* Show files */
	FiosFileScanner scanner(fop, callback_proc, file_list);
	if (subdir == NO_DIRECTORY) {
		scanner.Scan({}, *_fios_path, false);
	} else {
		scanner.Scan({}, subdir, true, true);
	}

	std::sort(file_list.begin() + sort_start, file_list.end());

	/* Show drives */
	FiosGetDrives(file_list);
}

/**
 * Get the title of a file, which (if exists) is stored in a file named